2201121078 has 64 divisors (see below), whose sum is σ = 4810143744. Its totient is φ = 667440000.

The previous prime is 2201121077. The next prime is 2201121103. The reversal of 2201121078 is 8701211022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201121071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2134423 + ... + 2135453.

It is an arithmetic number, because the mean of its divisors is an integer number (75158496).

Almost surely, 2^2201121078 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2201121078, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2405071872).

2201121078 is an abundant number, since it is smaller than the sum of its proper divisors (2609022666).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2201121078 is a wasteful number, since it uses less digits than its factorization.

2201121078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421.

The product of its (nonzero) digits is 448, while the sum is 24.

The square root of 2201121078 is about 46916.1068077904. The cubic root of 2201121078 is about 1300.8123281939.

The spelling of 2201121078 in words is "two billion, two hundred one million, one hundred twenty-one thousand, seventy-eight".